ssh into your ipod and look if there is a folder called mobileslideshow in your "Applications" directory...
edit: 'cuz if there IS one than it means something is broken with your springboard or summerboard but if there is NOTHING then it means ur photo app is missing

ssh into your ipod and look if there is a folder called mobileslideshow in your "Applications" directory...
edit: 'cuz if there IS one than it means something is broken with your springboard or summerboard but if there is NOTHING then it means ur photo app is missing